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Evolution Of Life

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EVOLUTION: Evolution can be described as a change in species over time. Dinosaur fossils are significant evidence of evolution and of past life on Earth. Evolution of Life The diversity of life on Earth today is the result of evolution. Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth’s biodiversity greatly increased. Figure below shows a timeline of the history of life on Earth. In the entire span of time, humans are relatively a new addition. Today, the most accepted theory of life on Earth is evolution, and there is a vast amount of evidence supporting this theory. However, this wasn’t always the case. Darwin and the Theory of Evolution The idea of evolution has been around for centuries. In fact, it goes all the way back to the ancient Greek philosopher Aristotle. However, evo...
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WHAT ARE ISOTOPES ?( about isotopes)

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isotope chemistry TOP QUESTIONS What is an isotope? Why do isotopes have different properties? When are isotopes stable? How were isotopes discovered?  An overview of isotopes.  isotope , one of two or more species of  atoms  of a  chemical element  with the same  atomic number  and position in the  periodic table  and nearly identical chemical behaviour but with different  atomic masses  and physical properties. Every chemical element has one or more isotopes.  phase diagrams of helium-3 and helium-4 Related Topics:   An  atom  is first identified and labeled according to the number of  protons  in its nucleus. This  atomic number  is ordinarily given the symbol  Z . The great importance of the atomic number derives from the observation that all atoms with the same atomic number have nearly, if not precisely, identical chemical properties. A large collection of atoms with the same a...
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ABOUT CARBON DATING METHOD ( RADIOCARBON _14)

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carbon-14 dating carbon-14 dating , also called  radiocarbon dating , method of age determination that depends upon the decay to  nitrogen  of radiocarbon (carbon-14).  Carbon -14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the  Earth’s  atmosphere; the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere Related Topics:   radiometric dating Radiocarbon present in molecules of atmospheric  carbon dioxide  enters the biological  carbon cycle : it is absorbed from the air by green plants and then passed on to animals through the  food chain . Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food. Once the organism dies, however, it ceases to absorb  carbon-14 , so that the amount of the radiocarbon in its tissues steadily decreases. Carbon-1...
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HISTORY OF SMARTPHONES ( JURNY OF MOBILES )

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The History and Evolution of the Smartphone: 1992-2018 The modern smartphone has taken a long 26-year journey to reach us in 2018, and it's changed a lot along the way. It’s an evolution that's taken the market by storm! What were once large and bulky luxury items have become small, compact devices we can’t live without. In fact, 77% of Americans  own a smartphone , according to Pew Research Center, and 95% of Americans own a cell phone of some kind. The history and evolution of the smartphone is important to understand, because it gives us a glimpse of where we've come from, and of what's coming. That goe...
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HISTORY OF MEASUREMENT

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The History of Measurements Measurement, loosely defined is the length, amount, or size of something that is measured. Long ago, the idea of a universal measuring system didn’t exist. That was, until the 18th century where measurement became a cohesive system. Before this period, countries such as France had measuring systems for nearly every profession. In 1795 the number of measurements in France alone numbered well over seven hundred. The names for many units of measurement were borrowed from human morphology. For example, the foot, the hand, the pace, etc. Still, however, these units of measurement were not standardized. As industry and trade expanded across the world, the need became dire for a single standardized system of measurement. If trade was to flourish, a unified system was necessary to create balance across the various industries and subsequently the world. Length If there were any measurement that has proven to be the most useful to humanity, it would be length. Example...
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WHAT IS BLOGGING ?( ABOUT BLOGGING )

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A Brief History of Blogging Blogs have become an integral part of online culture. Practically everyone reads blogs now, whether they’re “official” news blogs associated with traditional news media, topic-based blogs related to one’s work or hobbies, or blogs purely for entertainment, just about anyone you ask has at least one favorite blog. But it wasn’t always so. Blogs have a relatively short history, even when compared with the history of the Internet itself. And it’s only in the past five to ten years that they’ve really taken off and become an important part of the online landscape. The Early Years It’s generally recognized that the first blog was  Links.net , created by Justin Hall, while he was a Swarthmore College student in 1994. Of course, at that time they weren’t called blogs, and he just referred to it as his personal homepage. It wasn’t until 1997 that the term “weblog” was coined. The word’s creation has been attributed to  Jorn Barger , of the influential early...
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